一个AJAX类代码

作者: boowaga
来源: 51数据库
2021-08-20

基本用法：

复制代码代码如下:

 
var ajax = new ajaxobj(url); 
ajax.addlistener(200, function(r){ 
alert(r); 
}); 
ajax.send(); 

也可以连续调用：

复制代码代码如下:

 
var ajax = new ajaxobj(url).addlistener(200, function(r){ 
alert(r); 
}).send(); 

另外还支持自定义的post或get方式请求，以及监视不同的http状态码，自己看代码琢磨吧 :)
完整代码：

复制代码代码如下:

 
ajaxobj = function(url, method, content){ 
    this.r = null; 
    this.url = url; 
    this.method = method; 
    this.content = content; 
    this.header = {}; 
    this.header["connection"] = "close"; 
    this.header["content-type"] = "application/x-www-form-urlencoded"; 
    var self = this; 
    if(window.xmlhttprequest){ 
        this.r = new xmlhttprequest(); 
    }else if(window.activexobject){ 
        try { 
            this.r = new activexobject("msxml2.xmlhttp"); 
        } catch(e) { 
            try{ 
                this.r = new activexobject("microsoft.xmlhttp"); 
            } catch(e) { 
            } 
        } 
    } 
    this.addlistener = function(http_status, func){ 
        if(!this.l) 
            this.l=[]; 
        this.l[http_status] = func; 
        return this; 
    }; 
    this.setheader = function(name, value){ 
        this.header[name] = value; 
        this.r.setrequestheader(name, value); 
        return this; 
    }; 
    this.send = function(){ 
        if(this.method != "post" && this.method != "get") 
            this.method = "get"; 
        this.r.open(this.method, this.url, true); 
        for(var h in this.header) { 
            this.r.setrequestheader(h, this.header[h]); 
        } 
        this.r.send(this.content); 
    }; 
    if(this.r) this.r.onreadystatechange = function(){ 
        if(self.r.readystate == 4 && self.l[self.r.status] != null) 
            self.l[self.r.status](self.r.responsetext); 
    }; 
}; 